Smelly mucus in the nose, especially when it thickens and seems to drip incessantly down the back of your throat, is a sign of postnasal drip. Normally, mucus helps: keep your nasal membranes healthy. respond to infections.

Why does phlegm smell bad?

Smelly mucus in the nose, especially when it thickens and seems to drip incessantly down the back of your throat, is a sign of postnasal drip. Normally, mucus helps: keep your nasal membranes healthy. respond to infections.

How do I stop smelly mucus?

eating fiber-rich foods. avoiding foods and drinks that cause dehydration, such as caffeine and alcohol. using antihistamines or decongestants to treat nasal or sinus inflammation. avoiding foods and drinks that cause bad smells in the mouth, such as garlic and onions.